One of the questions I get constantly is what is the “right” settings for web sharpening.
Well, the reality is, there is none! Sharpening is a pretty varied practice (as is EVERYTHING in Photoshop) and if you have a method that works for you, then stick with it! Just be willing to try different things and change up the routine. The best practice is to use some different methods depending on the photo you’re sharpening. Some photos have hard edges (like buildings or very contrasting colors) and can “soak up” more sharpening than a portrait can. You will need to make your sharpening decision based on what is in your image.
The basics of web sharpening are simple, however. I’m going to keep this to using the USM since many readers may not have Smart Sharpen available (only in later versions of PS).
One very simple method of sharpening is to sharpen when you resize your image! When resizing your image you’ll have a few different options. To do a quick sharpen simply check “Resample Image” and switch to “Bicubic Sharper”.

Many times this is all the sharpening you’ll need.
If this isn’t enough, there’s a few different things you can try in the USM box.
Unsharpen Mask is found under the Filters-Sharpen Menu and looks like this:

The way the Unsharp Mask filter works is really to increase the contrast between adjacent pixels in your image. The result makes your image appear sharper.
AMOUNT Slider changes the increase in the contrast of the pixels. The higher the percentage, the higher the contrast between the pixels will be.
RADIUS Slider changes the width of the “band” of sharpening around the object. Pulling the radios very high will make halos appear in your image. (Though you can do a pretty cool effect if you pull it all the way up. Try it!) The greater the radius value, the wider the edge effects. And the wider the edge effects, the more obvious the sharpening.
THRESHOLD Slider is where you tell Photoshop how to differenciate what is an “edge”. Set too low, EVERYTHING will be considered an edge, and noise may be sharpened too much. Set too high and no sharpening will appear to have been done.
For a WEBSIZED image the basic settings that *I* follow are usually:
High Sharpening:
Amount: 110%
Radius: 1.0
Threshold: 0
Medium Sharpening:
Amount: 110%
Radius: .5
Threshold: 0
Low Sharpening:
Amount: 70%
Radius: .5
Threshold: 0
You can easily change these amounts to suit your photo!
Another “trick” that I sometimes use is to apply the high amount of sharpening and then immediately go to Edit-Fade Unsharp Mask and change the opacity of the USM to fit the photo.

*note, some people also use this to change the mode to Luminosity to avoid any color shifts when sharpening*
The last method that I use sometimes is to do a 3 pass USM that does a small USM filter 3 times successively. Sometimes this really helps to “tease out” some sharpness that isn’t appearing with the normal websharpen.
Often times a quick USM is all it takes to make a photo POP for web viewing.
Here’s a quick set of websharpening actions that have a High, Medium, Low and 3 pass method.
DOWNLOAD IT HERE
And hey.. Leave me a comment.. I like to know if you’ve been here.
Till Next time! Have a great Weekend!